procfs_osrel.c revision 197428
1197428Skib/*- 2197428Skib * Copyright (c) 2009 Konstantin Belousov 3197428Skib * All rights reserved. 4197428Skib * 5197428Skib * Redistribution and use in source and binary forms, with or without 6197428Skib * modification, are permitted provided that the following conditions 7197428Skib * are met: 8197428Skib * 1. Redistributions of source code must retain the above copyright 9197428Skib * notice, this list of conditions and the following disclaimer. 10197428Skib * 2. Redistributions in binary form must reproduce the above copyright 11197428Skib * notice, this list of conditions and the following disclaimer in the 12197428Skib * documentation and/or other materials provided with the distribution. 13197428Skib * 4. Neither the name of the University nor the names of its contributors 14197428Skib * may be used to endorse or promote products derived from this software 15197428Skib * without specific prior written permission. 16197428Skib * 17197428Skib * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18197428Skib * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19197428Skib * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20197428Skib * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21197428Skib * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22197428Skib * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23197428Skib * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24197428Skib * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25197428Skib * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26197428Skib * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27197428Skib * SUCH DAMAGE. 28197428Skib */ 29197428Skib 30197428Skib#include <sys/cdefs.h> 31197428Skib__FBSDID("$FreeBSD: head/sys/fs/procfs/procfs_osrel.c 197428 2009-09-23 12:08:08Z kib $"); 32197428Skib 33197428Skib#include <sys/param.h> 34197428Skib#include <sys/proc.h> 35197428Skib#include <sys/sbuf.h> 36197428Skib#include <sys/uio.h> 37197428Skib 38197428Skib#include <fs/pseudofs/pseudofs.h> 39197428Skib#include <fs/procfs/procfs.h> 40197428Skib 41197428Skibint 42197428Skibprocfs_doosrel(PFS_FILL_ARGS) 43197428Skib{ 44197428Skib const char *pp; 45197428Skib int ov, osrel, i; 46197428Skib 47197428Skib if (uio == NULL) 48197428Skib return (EOPNOTSUPP); 49197428Skib if (uio->uio_rw == UIO_READ) { 50197428Skib sbuf_printf(sb, "%d\n", p->p_osrel); 51197428Skib } else { 52197428Skib sbuf_trim(sb); 53197428Skib sbuf_finish(sb); 54197428Skib pp = sbuf_data(sb); 55197428Skib osrel = 0; 56197428Skib i = sbuf_len(sb); 57197428Skib while (i--) { 58197428Skib if (*pp < '0' || *pp > '9') 59197428Skib return (EINVAL); 60197428Skib ov = osrel * 10 + *pp++ - '0'; 61197428Skib if (ov < osrel) 62197428Skib return (EINVAL); 63197428Skib osrel = ov; 64197428Skib } 65197428Skib p->p_osrel = osrel; 66197428Skib } 67197428Skib return (0); 68197428Skib} 69